Citation:
PAN Deng-Ke. Synthesis and Properties of the Hollow Magnetic Solid Based Catalyst Fe3O4@LDO[J]. Chinese Journal of Inorganic Chemistry,
;2016, 32(1): 74-80.
doi:
10.11862/CJIC.2016.007
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The mixed oxides based on layered double hydroxide (LDO) are novel solid base catalyst, and their modification and functionalization have received more and more interesting in the area of catalysis. In this paper, the hollow magnetic solid base catalyst has been (Fe3O4@LDO) synthesized by coating LDO onto the hollow Fe3O4 particles. The Fe3O4@LDO particles possess well defined core-shell structure with Mg-Al Mixed Oxides as the shell and hollow Fe3O4 particle as the core. Owing to its unique hollow structure, the Fe3O4@LDO particles possess high colloid stability, and showing promising application in homogeneous catalysis. In the Knoevenagel condensation of benzaldehyde with ethyl acetoacetate under solvent free conditions, the Fe3O4@LDO particles gave the highest activity with yield of 62% in 2 h, showing high catalytic activity. In the mean time, the Fe3O4@LDO particles have strong magnetic response, can be easily separated and recycled after a catalyst reaction.
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Keywords:
- hollow magnetic particles,
- core shell structure,
- Fe3O4,
- LDO,
- solid base catalyst
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